package com.cxx.initializer;

import com.cxx.config.AppConfig;
import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;

/**
 * 自定义WebApplicationInitializer，实现web.xml配置文件的代码实现
 */
public class MyWebApplicationInitializer implements CxxWebApplicationInitializer {

    public void onStartup(ServletContext servletContext) throws ServletException {
        System.out.println("MyWebApplicationInitializer gogogogo");
        //通过注解的方式初始化Spring的上下文
        AnnotationConfigWebApplicationContext ac = new AnnotationConfigWebApplicationContext();
        //注册spring的配置类（替代传统项目中xml的configuration）
        ac.register(AppConfig.class);
        ac.refresh();

        // Create and register the DispatcherServlet
        //基于java代码的方式初始化DispatcherServlet
        DispatcherServlet servlet = new DispatcherServlet(ac);
        ServletRegistration.Dynamic registration = servletContext.addServlet("dispatcherServlet", servlet);
        registration.setLoadOnStartup(1);
        registration.addMapping("/*");
    }
}
